US6521093B2 - Press arrangement - Google Patents

Press arrangement Download PDF

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Publication number
US6521093B2
US6521093B2 US09/965,799 US96579901A US6521093B2 US 6521093 B2 US6521093 B2 US 6521093B2 US 96579901 A US96579901 A US 96579901A US 6521093 B2 US6521093 B2 US 6521093B2
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US
United States
Prior art keywords
press
roll
accordance
arrangement
material web
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/965,799
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English (en)
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US20020050330A1 (en
Inventor
Andreas Meschenmoser
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Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Assigned to VOITH PAPER PATENT GMBH reassignment VOITH PAPER PATENT GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MESCHENMOSER, ANDREAS
Publication of US20020050330A1 publication Critical patent/US20020050330A1/en
Application granted granted Critical
Publication of US6521093B2 publication Critical patent/US6521093B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof

Definitions

  • the invention relates to a press arrangement for processing a fibrous material web, in particular a paper or cardboard web.
  • Tandem-NipcoFlex-presses known up to now have been proven in operation. However, they are comparatively expensive and have a relatively long structural length. Additionally, when heavy paper types are used, a web tear can occur downstream of the pick-up roll.
  • the present invention provides an improved press arrangement in which the above-mentioned problems are eliminated.
  • a compact structure is to be achieved in addition to a web guidance that is as continuous as possible downstream of the wire.
  • a press arrangement for processing a fibrous material web, in particular a paper or cardboard web, having at least two press nips formed by two separate presses without a common center roll, in which the first roll, viewed in the web travel direction, is double-felted, and includes a suction press roll positioned on top, simultaneously embodied as a pick-up roll, as well as a mating roll positioned at the bottom.
  • press arrangements having a suction press roll assigned to a first roll and simultaneously serving as a pick-up roll are known from DE-A-199 02 139 and DE-A-199 12 497, in these known press arrangements the first and second roll, have a common center roll and/or at least one common felt.
  • a web tear downstream of the pick-up is avoided, even in the case of heavy papers, because a completely continuous web guidance is provided in the region downstream of the wire with the solution according to the invention.
  • This solution results in an inexpensive double-felt press concept, in particular for even-sided paper.
  • the suction press roll is simultaneously provided as a pick-up roll, the fibrous material web can be accepted by a wire belt of the wire section via the upper felt guided over these suction press rolls.
  • the mating roll allocated to the suction press roll is a sagging compensation roll or a crown bow compensation roll.
  • this mating roll allocated to the suction press roll can be, in particular, a so called Nipco-F roll, i.e., a self loading roll.
  • the second roll viewed in the web travel direction, is preferably a shoe press.
  • the second roll viewed in the web travel direction, can preferably be double-felted.
  • the press plane running through the second press nip is tilted in relation to the vertical.
  • separate felts are guided through the first press nip and through the second press nip.
  • an upper felt and a lower continuous belt in particular a press belt
  • the upper felt and the lower press belt are preferably guided through the second press nip only, i.e., not through the first press nip as well.
  • suction press roll It is practical for the suction press roll to be blind bored and/or grooved in order to allow at least a partial dewatering by means of spinning off water.
  • a gutter or collector is preferably allocated to the suction press roll that collects the water spun off the suction press roll. With the aid of the suction press roll positioned on top, the spun off water can be slowed down to some extent, allowing it to collect in a gutter or collector.
  • a practical embodiment of the press arrangement according to the invention is distinguished by the fact that, in the region of the transfer point, the upper felt, guided through the second press nip, is guided around a deflection roll, preferably embodied as a suction roll. It is practical for the upper felt, guided through the second press nip, to be guided around a deflection roll, preferably embodied as a suction roll, in the region of the transfer point.
  • the fibrous material web is accepted by an upper felt guided through the second press nip in a region between the deflection roll, allocated to the lower felt of the first press, and another deflection roll allocated to this lower felt.
  • the press plane through the first press nip is advantageously tilted relative to the vertical.
  • the suction press roll is preferably driven. Additionally or alternatively, the mating roll allocated to this suction press roll can be driven as well.
  • the second press provided as a shoe press includes a shoe press roll positioned on top and a mating roll positioned at the bottom.
  • the mating roll is preferably driven.
  • Another advantageous embodiment of the press arrangement according to the invention is distinguished by the fact that the second press, viewed in the web travel direction, is single-felted, that the roll positioned at the bottom of the second press contacts the fibrous material web, and that at least one doctor is allocated to the roll positioned at the bottom.
  • the present invention is directed to a press arrangement for processing a fibrous material web that includes at least first and second presses arranged to form at least first and second press nips.
  • the at least first and second presses are structured and arranged without a common center roll and without a common felt.
  • the first press is a double felted press including a suction press roll and a mating roll, and is positioned upstream from the second press relative to a web run direction.
  • the suction press roll is structured and arranged as a pick-up roll and is located on top of said mating roll.
  • the material web can be a paper or a cardboard web.
  • the double felted press can include at least first and second felts arranged to sandwich the material web in said first press nip.
  • the arrangement further includes an upper felt guided around the suction press roll, which may be arranged to accept the material web from an upstream section of a web production machine.
  • the upper felt can be arranged to accept the material web from a wire belt.
  • the mating roll can include a sagging compensation roll. Additionally, or alternatively, the mating roll may include a self-loading roll.
  • the second press may include a shoe press. Additionally, or alternatively, the second press can be a second double felted press.
  • the second double felted press may include at least first and second felts arranged to sandwich the material web in the press nip.
  • the double felted press may include at least first and second felts arranged to sandwich the material web in the first press nip, and the second double felted press comprises at least third and fourth felts arranged to sandwich the material web in the second press nip.
  • the second press may be arranged such that a press plane through the second press nip is oriented obliquely to vertical.
  • the press arrangement may further include an upper felt and a lower continuous belt guided through the second press nip.
  • the lower continuous belt can be a press belt.
  • the upper felt and the lower continuous belt may be guided through the second press nip, but not through the first press nip.
  • the suction press roll may include at least one of a blind bored and grooved surface.
  • a gutter can be positioned in a region of the suction press roll to collect water spun off of the suction press roll.
  • the press arrangement may include a deflection roll positioned between the first press and the second press.
  • a lower felt of the first press can be arranged to guide the material web over the deflection roll and an upper felt of the first press may be separated from the material web and the lower felt in a region of the deflection roll.
  • An upper felt of the second press can be arranged to accept the material web from the lower felt of the first press at a transfer point in a vicinity of the deflection roll.
  • the deflection roll may include a suction roll, the region of the deflection roll is upstream of the deflection roll, and the transfer point can be downstream of the deflection roll.
  • a second deflection roll can be provided, around which the upper felt of the second press may be guided in a region of the transfer point.
  • Another deflection roll can be provided around which the lower felt of the first press is guided, the another deflection roll may be located downstream from the deflection roll.
  • the upper felt of the second press may be arranged to accept the material web from the lower felt of the first press in a region between the deflection roll and the another deflection roll.
  • the first press can be positioned such that a press plane through the first press nip is oriented obliquely with respect to vertical.
  • suction press roll can be a driven roll.
  • mating roll may be a driven roll.
  • the second press can include a shoe press roll and a mating roll.
  • the shoe press roll can be positioned on top of the mating roll.
  • the second press can be a single-felted press.
  • the single-felted press may include a roll having a surface arranged to directly contact the material web.
  • the single-felted press can further include at least one doctor arranged against the roll surface.
  • the single-felted press may further include a shoe press roll positioned above the roll.
  • FIG. 1 a schematic depiction of a first embodiment of a press arrangement having two double-felted presses each
  • FIG. 2 a schematic depiction of another embodiment of the press arrangement having one single felted press and one double felted press.
  • FIG. 1 shows, in a purely schematic depiction, a first embodiment of a press section, arranged between a wire section 10 and a drying section 12 , of a machine for producing a fibrous material web 14 , in particular a paper or a cardboard web.
  • the press section provided between the wire section 10 and the drying section 12 includes a double press arrangement 16 having two press nips S 1 and S 2 positioned one after the other in the web travel direction L, which are formed by two separate presses 18 , 20 without any common center roll or common felts.
  • the first press 18 viewed in the web travel direction L, includes a suction press roll 22 , simultaneously embodied as a pick-up roll, and positioned on the top, and a mating roll 24 positioned at the bottom.
  • the upper felt 26 guided around the suction press roll 22 , accepts the fibrous material web 14 from a wire belt 30 of the wire section 10 .
  • the mating roll 24 allocated to the suction press roll 22 can, in particular, be embodied as a sagging (or deflection) compensation roll.
  • This mating roll 24 can be embodied by a so-called Nipco-F-roll, i.e., a self-loading roll.
  • the suction press roll 22 can be blind bored and/or grooved in order to allow at least a partial dewatering by spinning off water.
  • a gutter or collector 32 is allocated to a suction press roll 22 , which accepts the water spun off of the suction press roll 22 .
  • the suction press roll 22 and the mating roll 24 allocated thereto are both driven.
  • the suction press roll 22 is arranged diagonally to the left above the mating roll 24 allocated thereto.
  • the press plane through the first press nip S 1 is tilted with respect to the vertical as well.
  • the fibrous material web 14 guided out of the first press nip S 1 together with the upper felt 26 and the lower felt 28 is separated from the upper felt 26 in the region of a deflection roll 34 , preferably embodied as a suction roll, and is guided together with the lower felt 28 around the deflection roll 34 , in which region they are subsequently accepted by an upper felt 36 , guided through a second press nip S 2 .
  • the fibrous material web 14 is accepted by an upper felt 36 guided through the second press nip S 2 in a region between the deflection roll 34 allocated to the lower felt 28 of the first press 18 and another deflection roll 38 allocated to this lower felt 28 .
  • the upper felt 36 guided through the second press nip S 2 is guided around a deflection roll 37 , preferably embodied as a suction roll as well, in the region of the transfer point 40 .
  • a lower felt 42 is allocated to the press 20 , for example.
  • This second press 20 may be double felted as well.
  • a continuous belt can also be provided, such as, in particular, a press belt or the like, instead of a lower felt 42 .
  • the second press 20 viewed in the web travel direction L, is a shoe press in the present case, having a shoe press roll 44 positioned at the top and a mating roll 46 , preferably driven, positioned at the bottom.
  • the shoe press roll 44 is positioned diagonally on the right above the mating roll 46 .
  • the press plane through the second press nip S 2 is again tilted relative to the vertical.
  • the upper felt 36 and the lower felt 42 and/or the respective lower continuous belt are guided through the second press nip S 2 only, i.e., not through the first press nip S 1 as well.
  • separate felts and/or separate continuous belts travel through the first press nip S 1 and through the second press nip S 2 .
  • the roll jacket of the shoe press roll 44 can be blind bored and/or grooved in order to at least partially allow another dewatering by means of spinning off water.
  • a gutter or collector 48 is allocated to this roll 44 as well in order to collect the water spun off of the roll 44 .
  • At least one gutter or collector 58 or 60 each is allocated to the roll 24 positioned at the bottom and to the roll 46 positioned at the bottom.
  • the fibrous material web 14 is guided together with the lower felt 42 around the deflection roll 50 , preferably embodied as a suctioned roll, in whose region the upper felt 36 is separated from the fibrous material web 14 and the lower felt 42 .
  • the fibrous material web 14 is accepted by a dry wire 54 in the region of a deflection roll 52 embodied as a suction roll, and is guided to the first drying cylinder 56 of the drying section 12 .
  • FIG. 2 shows another embodiment of a press section arranged between a wire section 10 and a drying section 12 of a machine for producing a fibrous material web 14 .
  • the fibrous material web 14 may be a paper or cardboard web.
  • the press section comprises a double press arrangement 16 having two press nips S 1 and S 2 arranged subsequent to one another in the web travel direction L, formed by two separate presses 18 , 20 without any common center roll or any common felts.
  • the present press section differs from that of FIG. 1 primarily in that the second press 20 , viewed in the web travel direction L, is not double-felted, but rather single-felted and in that the roll 46 of this second press 20 , positioned at the bottom, contacts the fibrous material web 14 and at least one doctor 62 is allocated to the roll 46 positioned at the bottom.
  • the fibrous material web 14 travels a certain distance on the roll 46 positioned at the bottom, from which it is accepted, for example, by a drying wire 54 and is guided back to the first drying cylinder 56 of the drying section 12 .
  • the drying wire 54 can also be guided over a deflection roll 52 , particularly embodied as a suction roll.
  • this embodiment can have essentially the same design as that of FIG. 1 .
  • Corresponding parts have been given the same reference characters.

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US09/965,799 2000-10-31 2001-10-01 Press arrangement Expired - Fee Related US6521093B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10053935A DE10053935A1 (de) 2000-10-31 2000-10-31 Pressenanordnung
DE10053935 2000-10-31
DE10053935.1 2000-10-31

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US20020050330A1 US20020050330A1 (en) 2002-05-02
US6521093B2 true US6521093B2 (en) 2003-02-18

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US (1) US6521093B2 (de)
EP (1) EP1201820A3 (de)
DE (1) DE10053935A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10226825A1 (de) * 2002-06-15 2003-12-24 Voith Paper Patent Gmbh Pressanordnung

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4110156A (en) 1976-06-14 1978-08-29 Escher Wyss Limited Compact press at the web transfer position of a paper making machine
DE3942396A1 (de) 1988-12-23 1990-06-28 Tampella Oy Ab Verfahren und anordnung zum leiten einer faserbahn von einem sieb durch eine pressenpartie
US5308450A (en) 1991-04-16 1994-05-03 Sulzer Escher Wyss Gmbh Press section of a papermaking machine
EP0795642A1 (de) 1996-03-14 1997-09-17 Voith Sulzer Papiermaschinen GmbH Pressenpartie einer Papiermaschine
DE19921205A1 (de) 1998-09-02 2000-03-09 Voith Sulzer Papiertech Patent Pressenanordnung
EP0985764A2 (de) 1998-09-02 2000-03-15 Voith Sulzer Papiertechnik Patent GmbH Pressenanordnung
US6090244A (en) * 1997-01-28 2000-07-18 Voith Sulzer Papiermaschinen Gmbh Press section
DE19902139A1 (de) 1999-01-20 2000-07-27 Voith Sulzer Papiertech Patent Pressenanordnung
DE19912497A1 (de) 1999-03-19 2000-09-21 Voith Sulzer Papiertech Patent Presseanordnung
EP1101861A2 (de) 1999-11-16 2001-05-23 Voith Paper Patent GmbH Pressenanordnung

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4110156A (en) 1976-06-14 1978-08-29 Escher Wyss Limited Compact press at the web transfer position of a paper making machine
DE3942396A1 (de) 1988-12-23 1990-06-28 Tampella Oy Ab Verfahren und anordnung zum leiten einer faserbahn von einem sieb durch eine pressenpartie
US5124000A (en) 1988-12-23 1992-06-23 Oy Tampella Ab Method of and an arrangement for passing a fibre web from a wire through a press section
US5308450A (en) 1991-04-16 1994-05-03 Sulzer Escher Wyss Gmbh Press section of a papermaking machine
US5431787A (en) 1991-04-16 1995-07-11 Sulzer-Escher Wyss Gmbh Press section of a papermaking machine
EP0795642A1 (de) 1996-03-14 1997-09-17 Voith Sulzer Papiermaschinen GmbH Pressenpartie einer Papiermaschine
US6090244A (en) * 1997-01-28 2000-07-18 Voith Sulzer Papiermaschinen Gmbh Press section
DE19921205A1 (de) 1998-09-02 2000-03-09 Voith Sulzer Papiertech Patent Pressenanordnung
EP0985764A2 (de) 1998-09-02 2000-03-15 Voith Sulzer Papiertechnik Patent GmbH Pressenanordnung
DE19902139A1 (de) 1999-01-20 2000-07-27 Voith Sulzer Papiertech Patent Pressenanordnung
US6334932B1 (en) * 1999-01-20 2002-01-01 Voith Sulzer Papiertechnik Patent Gmbh Press arrangement and process
DE19912497A1 (de) 1999-03-19 2000-09-21 Voith Sulzer Papiertech Patent Presseanordnung
EP1101861A2 (de) 1999-11-16 2001-05-23 Voith Paper Patent GmbH Pressenanordnung

Also Published As

Publication number Publication date
US20020050330A1 (en) 2002-05-02
DE10053935A1 (de) 2002-05-08
EP1201820A3 (de) 2002-11-20
EP1201820A2 (de) 2002-05-02

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Owner name: VOITH PAPER PATENT GMBH, GERMANY

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Effective date: 20010924

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Effective date: 20070218